470 



JENNINGS-HEREDITY IN PROTOZOA. 



[April 24, 



condition of Table XXII. are given in Diagram 6; these, taken in 

 connection with Fig. 5 and with Tables XIX. to XXII. give a good 

 idea of the changes in dimensions and variation that may be pro- 



50 



45 

 40 



o 35 



"025 



C^ 15 



u6 128 140 152 164 176 188 200 212 224 236 



Length in ]\Iicrons. 



Diagram 6. Polygons of variation in length for a culture of descendants 

 of the individual D when subjected successively to varied conditions of nu- 

 trition. The numbers above the highest points of the polygons correspond 

 to rows of Table XVIII., in which are given the constants for the different 

 polygons. S, culture starved a week. 9 (heavy broken line), same as 8, but 

 after 24 hours in fresh hay infusion. 10, same after one week in the same 

 tluid, unchanged. //, same after 48 hours in fresh hay infusion, x, polygon 

 for combination of 8, 10 and 11, showing its resemblance to the polygon for 

 9 alone. 



The correlation tables for these polygons arc numbers XIX. to XXII., 

 pages 466, 467. 



duced in a short time by changes in the conditions of nutrition. 

 Evidently Table XX., taken twenty-four hours after the starving 

 specimens were placed in the fresh hay infusion, is a transitional 



